public static bool IsHijackable(ODataQueryOptions <V2FeedPackage> options, out HijackableQueryParameters hijackable)
{
// Check if we can process the filter clause
if (!CanProcessFilterClause(options))
{
hijackable = null;
return(false);
}
// Build expression (this works around all internal classes in the OData library - all we want is an expression tree)
var expression = options.ApplyTo(EmptyQueryable, QueryResultDefaults.DefaultQuerySettings).Expression;
// Unravel the comparisons into a list we can reason about
List <Tuple <Target, string> > comparisons = new List <Tuple <Target, string> >();
Expression remnant = FindQueryableWhere(expression as MethodCallExpression);
MethodCallExpression where;
while (IsQueryableWhere(where = remnant as MethodCallExpression))
{
var extractedComparisons = ExtractComparison(where).ToList();
if (!extractedComparisons.Any() || extractedComparisons.Any(c => c == null))
{
hijackable = null;
return(false);
}
else
{
// We recognize this comparison, record it and keep iterating on the nested expression
comparisons.AddRange(extractedComparisons);
remnant = where.Arguments[0];
}
}
// We should be able to hijack here
if (comparisons.Any())
{
hijackable = new HijackableQueryParameters();
foreach (var comparison in comparisons)
{
if (comparison.Item1 == Target.Id)
{
hijackable.Id = comparison.Item2;
}
else if (comparison.Item1 == Target.Version)
{
hijackable.Version = comparison.Item2;
}
else
{
hijackable = null;
return(false);
}
}
return(true);
}
hijackable = null;
return(false);
}
public static bool IsHijackable(ODataQueryOptions<V2FeedPackage> options, out HijackableQueryParameters hijackable)
{
// Check if we can process the filter clause
if (!CanProcessFilterClause(options))
{
hijackable = null;
return false;
}
// Build expression (this works around all internal classes in the OData library - all we want is an expression tree)
var expression = options.ApplyTo(EmptyQueryable, QueryResultDefaults.DefaultQuerySettings).Expression;
// Unravel the comparisons into a list we can reason about
List<Tuple<Target, string>> comparisons = new List<Tuple<Target, string>>();
Expression remnant = FindQueryableWhere(expression as MethodCallExpression);
MethodCallExpression where;
while (IsQueryableWhere(where = remnant as MethodCallExpression))
{
var extractedComparisons = ExtractComparison(where).ToList();
if (!extractedComparisons.Any() || extractedComparisons.Any(c => c == null))
{
hijackable = null;
return false;
}
else
{
// We recognize this comparison, record it and keep iterating on the nested expression
comparisons.AddRange(extractedComparisons);
remnant = where.Arguments[0];
}
}
// We should be able to hijack here
if (comparisons.Any())
{
hijackable = new HijackableQueryParameters();
foreach (var comparison in comparisons)
{
if (comparison.Item1 == Target.Id)
{
hijackable.Id = comparison.Item2;
}
else if (comparison.Item1 == Target.Version)
{
hijackable.Version = comparison.Item2;
}
else
{
hijackable = null;
return false;
}
}
return true;
}
hijackable = null;
return false;
}
public static bool IsHijackable(ODataQueryOptions <V2FeedPackage> options, out HijackableQueryParameters hijackable)
{
if (options.Filter?.FilterClause != null &&
options.Filter.FilterClause.Expression.Kind == QueryNodeKind.SingleValueFunctionCall &&
options.Filter.FilterClause.ItemType.Definition.TypeKind == EdmTypeKind.Entity)
{
var functionCallExpression = (SingleValueFunctionCallNode)options.Filter.FilterClause.Expression;
if (string.Equals(functionCallExpression.Name, "substringof", StringComparison.OrdinalIgnoreCase))
{
// The 'substringof' function cannot be applied to an enumeration-typed argument
hijackable = null;
return(false);
}
}
// Build expression (this works around all internal classes in the OData library - all we want is an expression tree)
var expression = options.ApplyTo(EmptyQueryable, QueryResultDefaults.DefaultQuerySettings).Expression;
// Unravel the comparisons into a list we can reason about
List <Tuple <Target, string> > comparisons = new List <Tuple <Target, string> >();
Expression remnant = FindQueryableWhere(expression as MethodCallExpression);
MethodCallExpression where;
while (IsQueryableWhere(where = remnant as MethodCallExpression))
{
var extractedComparisons = ExtractComparison(where).ToList();
if (!extractedComparisons.Any() || extractedComparisons.Any(c => c == null))
{
hijackable = null;
return(false);
}
else
{
// We recognize this comparison, record it and keep iterating on the nested expression
comparisons.AddRange(extractedComparisons);
remnant = where.Arguments[0];
}
}
// We should be able to hijack here
if (comparisons.Any())
{
hijackable = new HijackableQueryParameters();
foreach (var comparison in comparisons)
{
if (comparison.Item1 == Target.Id)
{
hijackable.Id = comparison.Item2;
}
else if (comparison.Item1 == Target.Version)
{
hijackable.Version = comparison.Item2;
}
else
{
hijackable = null;
return(false);
}
}
return(true);
}
hijackable = null;
return(false);
}
public static bool IsHijackable(ODataQueryOptions<V2FeedPackage> options, out HijackableQueryParameters hijackable)
{
if (options.Filter?.FilterClause != null
&& options.Filter.FilterClause.Expression.Kind == QueryNodeKind.SingleValueFunctionCall
&& options.Filter.FilterClause.ItemType.Definition.TypeKind == EdmTypeKind.Entity)
{
var functionCallExpression = (SingleValueFunctionCallNode) options.Filter.FilterClause.Expression;
if (string.Equals(functionCallExpression.Name, "substringof", StringComparison.OrdinalIgnoreCase))
{
// The 'substringof' function cannot be applied to an enumeration-typed argument
hijackable = null;
return false;
}
}
// Build expression (this works around all internal classes in the OData library - all we want is an expression tree)
var expression = options.ApplyTo(EmptyQueryable, QueryResultDefaults.DefaultQuerySettings).Expression;
// Unravel the comparisons into a list we can reason about
List<Tuple<Target, string>> comparisons = new List<Tuple<Target, string>>();
Expression remnant = FindQueryableWhere(expression as MethodCallExpression);
MethodCallExpression where;
while (IsQueryableWhere(where = remnant as MethodCallExpression))
{
var extractedComparisons = ExtractComparison(where).ToList();
if (!extractedComparisons.Any() || extractedComparisons.Any(c => c == null))
{
hijackable = null;
return false;
}
else
{
// We recognize this comparison, record it and keep iterating on the nested expression
comparisons.AddRange(extractedComparisons);
remnant = where.Arguments[0];
}
}
// We should be able to hijack here
if (comparisons.Any())
{
hijackable = new HijackableQueryParameters();
foreach (var comparison in comparisons)
{
if (comparison.Item1 == Target.Id)
{
hijackable.Id = comparison.Item2;
}
else if (comparison.Item1 == Target.Version)
{
hijackable.Version = comparison.Item2;
}
else
{
hijackable = null;
return false;
}
}
return true;
}
hijackable = null;
return false;
}
